Frank a



P. A. HUNTINGTON.

(No Model.)

GRUSHING MILL.

No. 419,256. Patented Jan. 14,1890.

N. PETERS. PMv-uuw m wumn m. mu

UNITED STATES PATENT OFFICE.

FRANK A. HUNTINGTON, OF SAN FRANCISCO, CALIFORNIA.

CRUSHlNG-MILL.

SPECIFICATION forming part of Letters Patent No. 419,256, dated January14, 1890.

Application filed April 14, 188B. $erial No. 270,649. (No model.) i

To all whom it may concern.-

Be it known that I, FRANK A. HUNTINGTON, of the city and county of SanFrancisco, State of California, have invented an Improvement inCrushing-Mills; and I hereby declare the following to be a full, clear,and exact description of the same.

My invention relates to improvements in' that class of crushing-mills inwhich a vibrating or oscillating jaw operates in conjunction with acylinder, between which and the jaw the rock is crushed or broken; andmy invention consists in the constructions and combinations of deviceswhich I shall hereinafter fully describe and claim.

Figure l is a side elevation of the machine with a part of the casingbroken away, and showing the hopper and driving-shaft in section. Fig. 2is a detail showing a part of thrust-bearing for the lower end of thejaw.

G is an elastic rubber or other spring connected with the jaw by the rodH, so as to keep the lower end of the jaw in contact with the toggle Ewithout the necessity of making a cap or box to hold the latter inplace. The face of the jaw which is adjacent to the periphery of theroller is curved,

as shown, into an arc of much larger radius than that of the cylinder,and is also provided with a heavy removable wearing-die I. The upper endof the oscillating jaw is sup ported upon an adjustable eccentric uponthe driving-shaft J, so that when this shaft is rotated the action ofthe eccentric Will cause a rotary motion of the upper part of the jaw inthe direction shown by the arrow, and thus cause the jaw to alternatelyad- Vance toward and recede from the face of the cylinder. The lower endof the jaw is ad justed to or from the roller or cylinder by insertingthin steel plates behind the box F, so that said jaw may stand as nearto the cylinder as is desirable, and the space at this point regulatesthe fineness of the material which passes out. By this adjustment I amenabledto feed the broken rock directly into the subsequent crusherWithout any intermediate feeder. The rotary movement of the upper .endof this jaw causes the crushingface'to advance toward the cylinder andto move downward at the same time.

The rock to be crushed is contained in the hopper K above the-cylinder,so that the rock falls into the space between the cylinder and theoscillating jaw, this space being widest at the upper end, as shown inthe drawings, and the peculiar rotary and downward movement of the jawcauses the rock to be carried downward between the cylinder and the jaw,the cylinder rotating toward the jaw' with each oscillating movement ofthe latter,

so that the rock is gradually carried downward and reduced by degrees toa fineness which will allow it to fall out at the bottom. In order toprevent the cylinder from rotating backward with each upward movement ofthe jaw on its return-stroke, I have fitted short cylinders L into thespaces between the edges M of the cylinder and the inclined block N,which is fitted between the cylindershaft and these edges, so that therollers lying in these spaces Will allow the cylinder to rotate freelyin the direction of the arrow,

but any movement backward, caused by the friction or lifting action ofthe rock between the jaw andlthe cylinder, will be checked by therollers L, which bind in the channel in which they lie and act as aclutch mechananism to prevent this backward rotation.

That portion of the driving-shaft J which passes through the upper endof the oscillating jaw is turned eccentric, as shownat O, and upon theoutside of this is fitted another eccentric P, having the same throw asthe eccentric O. WVhen the larger portion of these two eccentrics liesupon the same side of the shaft J, it is manifest that the throw will beequal to the sum of the eccentricities of the two, but when the outereccentric is turned around so that its larger portion is diametricallyopposite to the larger portion of the eccentric O the two will exactlyneutralize each other. The movement of the oscillating jaw may then beregulated to any desired degree between these two points by simplyturning the outer eccentric around upon the inner one. In order tosecure the outer eccentric at any desired point, I employ a gib Q, the

inner face of which fits the curve of the eccentric O, and the key B,being driven in behind it, causes it to bind and hold the eccentric atany desired position.

\Vhen the rapidity of feeding and crushing any particular kind of rockhas been determined upon, the eccentrics are adjusted to give the properamount of oscillation to the jaw and are then keyed in place. Themachine thus forms a self-feeder, which may be adjusted to any degree ofnicety to feed ore or other material to stamps or other crushing deviceswhen regularity of supply is required, and it performs the double officeof a rock-breaker and an ore-feeder.

The cylinder has flanges S projecting upon each side of the oscillatingjaw, and these serve to retain the rock in place between the prevent theroller from turning backward,

said mechanism consisting of the short cylinders M and flanged block N,and an openbottomed feed-hopper fixed over the vertical center of theroller, so that its contents are supported upon the top of the rollerand the latter acts as carrier and feeder and crushing-jaw,substantially as described.

In witness whereof I have hereunto set my hand.

FRANK A. HUNTINGTON.

\Vitnesscs:

S. IT. NOURSE, H. 0. LEE.

